Ventilation apparatus



FIG. 1 is an upper side perspective view of a ventilation apparatus in accordance with our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 a rear elevation view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a left-side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a ventilation apparatus, as shown and described. 